McCartney also credits Ono with helping Lennon stretch artistically, allowing songs such as "Imagine" to be written, The Guardian adds.

"I don’t think he would have done that without Yoko, so I don’t think you can blame her for anything. When Yoko came along, part of her attraction was her avant garde side, her view of things, so she showed him another way to be, which was very attractive to him," McCartney said.

McCartney is known for giving 15-minute interviews and has aimed for a measure of privacy in his personal life, the piece notes.